Method and apparatus for eliminating odors and killing bacteria associated with emissions from sewer and grease trap vents

ABSTRACT

The present invention provides a method for the treatment of hazardous biologicals being exhausted from Sewer and grease trap vents. Such as penetrate the roof of public schools, commercial kitchens or multiple occupant restroom facilities. The method eliminates odors and kills bacteria associated with said emissions from sewer and grease trap vents. These said emissions are neutralized when exposed to the Mixture of ozone and ultraviolet radiation.

BACKGROUND

[0001] 1. Field of Invention

[0002] This invention relates to ultraviolet radiation and ozone, used in the cleaning of water, sewage, and air. Specifically those dealing with air. Air can become polluted by emissions from sewer and grease trap vents. These said emissions can be hazardous to human health. Making the air cleaner is a matter of removal of pollutants from their emissions source. There are filters and purifiers available to clean air, however, none of these address sewer and grease trap stack emissions. This invention kills bacteria and eliminates odor from sewer and grease trap vent stacks, therefore reducing the hazards that are associated with said emissions. The treatment method is to use ozone in combination with exposure to ultraviolet radiation. Ozone has been used for more than sixty years in Europe for the treatment of water. The role of ozone in waste fluid treatment may be classified as both an oxidant and a germicidal compound. At least four distinct recognized applications of ozone are: (1) as a bactericide, (2) as a viricide, (3) as a powerful chemical oxidant, and (4) as a promoter of hydroxyl radicals when combined with ultraviolet radiation.

[0003] The potent germinal properties of ozone have been attributed to its high oxidation potential. Research indicates that disinfections by ozone are a direct result of bacterial cell wall disintegration. Ozone has several attributes in the treatment of waste fluids, such as odor control, color removal, and iron and manganese removal. Ozone oxidizes inorganic substances completely and rapidly, e.g., sulfides to sulfates, and nitrates to nitrites. Even greater importance lies in Ozone's capability of breaking down complex organic chemicals.

[0004] 2. Description of Prior Art

[0005] U.S. Pat. No. 6,096,219 Aug. 1, 2000, to Lawrence M. Green, and Michael G. Nickelsen, both of Florida. Developed a method and apparatus for pretreatment of hazardous waste material. Their invention provided a method for pretreatment of hazardous biological and chemical contaminants from a waste fluid stream prior to discharge to a wastewater treatment facility such as a publicly owned water treatment works. Their apparatus treats waste fluid streams with ozone, then exposes the mixture to ultraviolet radiation.

[0006] And

[0007] U.S. Pat. No. 6,156,192 Dec. 5, 2000, John M. Rummler, of Kittery Point, Me. Waste treatment system, invention which provides a waste treatment process and apparatus in which a high degree of separation is initially provided for separating solid and liquid components. Once the separator separates the solids and liquids, a fire tube combusts the solids with microwaves. The liquids are treated in a liquid treatment system which includes particle filtration/separation, and treatment with ozone and ultraviolet radiation.

[0008] As well as

[0009] U.S. Pat. No. 6,117,324 Sep. 12 2000, Annel K. Greene; Charles S. Knight, both of Seneca, S.C. A system and process for treating animal waste. Treating the wash water runoff from pen cleaning etc. It includes filtration and ozone treatment of the contaminated water through a series of three graduated holding ponds.

[0010] These three different inventions have a common goal of sewage clean up, by appling ozone combined with ultraviolet radiation.

[0011] U.S. Pat. No. 6,129,849 Yoshikawa Et al. Oct. 10, 2000, Process for accelerating reaction of ozone with a catalyst for the treatment of water by injection of ozone. This claims the removal of harmful matters, odor and color. For wastewater recycling of fish and farm ponds.

[0012] And

[0013] U.S. Pat. No. 5,935,431 Aug. 10 1999, Amos Korin, of 16 Mountain view Dr, Weston, Conn. 06883 A process and apparatus using ultraviolet and ozone for water purifying and for water disinfections of dental unit water supply systems.

[0014] And

[0015] U.S. Pat. No. 420,720 Feb. 15 2000, Alfredo J. Teran, John R. Derrick, Jr., of Rockledge; Nidal A. Samad, of Merritt Island; W. Todd Willoughby: Igor A. Vassiliev, Both of Cape Canaveral: Louis V. Mangicarpa; Carlos B. Diax, Both of Merritt Island all of Florida.

[0016] The ornamental design of an apparatus for the purification of water, using ultraviolet radiation and ozone. Used to clean drinking water.

[0017] All three of this group are different inventions with one common goal to clean water by appling ozone combined with ultraviolet radiation.

[0018] U.S. Pat. No. 5.972,196 Oct. 26 1999, Oliver J. Murphy; G. Duncan Hitchens, both of Bryan, Tex. Uses electrochemical production of ozone and hydrogen peroxide. Developed to sterilize medical instruments and medical waste. It oxidizes organics found in clean up wastewater, such as laundry and food production.

[0019] And

[0020] U.S. Pat. No. 4,752,401 June 21, 1988 By Willem J. Bodenstein, Ft. Myers, Fla. Water treatment system for swimming pools and potable water. For the treatment of re-circulated water, either potable water or for bathing, using at least one ozone producing ultraviolet lamp.

[0021] And

[0022] U.S. Pat. No. 5,256,379 Oct. 26. 1993 By. Anthony DeLoach, 1630 Jewel Ave., Sarasota, Fla. 34240. Apparatus and method for removing hydrocarbons from airstreams. An apparatus and method for removing hydrocarbon contaminates flowing into a chamber in the presence of a nozzle spraying an atomized reagent such as hydrogen peroxide and/or ozone through the air stream. For the clean up of contaminated soil or ground water. To flush out gasoline contaminations.

[0023] All three of this group are yet different inventions with a common use for ozone combined with ultraviolet radiation, to sterilize and remove impurities.

[0024] In conclusion, not one of these prior arts addressed sewer or grease trap emissions at the vent stack. And insofar as I am aware, no sewer and grease trap vent stack emissions cleaner has formerly been developed with the combination and application presented in this patent.

SUMMARY

[0025] This invention is a device that eliminates sewer and grease trap vented odors, and kills bacteria in the process. The device houses a combination unit that produces ultraviolet radiation and ozone. The ultraviolet lamp is contained in the elongated tube. This tube is connected to the building sewer or grease trap vent pipe. And discharges treated vapors to the outside air. Attached to the outside of the elongated tube is the electrical and fan enclosure. This enclosure houses a blower fan and electrical controls. The fan draws outside air and forces it into the elongated tube, where it is exposed to ultraviolet radiation. Since sewer system exhaust is oxygen depleted, the additional outside air is important to the operation. Without the 20 percent plus oxygen that the fan forces into the unit, it will not make the ozone needed to break down the odor causing sulfides and methane gas.

[0026] The radiation from the ultraviolet light emission kills the bacteria and breaks down the undesirable carbon molecules. This process eliminates most of the odors and bacteria from the sewer or grease trap vent exhaust; thereby, preventing the discharge of dangerous vapors from accidentally being drawn into the occupied spaces.

[0027] On low barometric pressure days, the undesirable vapors hug the roof line of structures and follow the movement of air. Thus allowing the undesirable vapors to reenter the building or descend to the surrounding areas. This is especially true if the fresh air intakes of the ventilation system, is too close, or down wind of the sewer or grease trap vent.

[0028] The invention eliminates the odors, bacteria, and undesirable vapors. The results is a more pleasant and healthier environment. It is well known that ultraviolet light will kill bacteria, and ozone will eliminate odors. It is believed that the combination presented in this application herein, has not been attempted in the past.

THE THREE OBJECTS AND ADVANTAGES

[0029] In the past an accepted method of stopping the outflow of offensive odors from sewer and grease trap vent pipes has been to block the outflow by the use of a one-way vent cap. This type cap allowed the sewer system to draw in the air needed for the system to drain properly. This type of one-way vent cap blocks the outflow when the system needs to exhaust. Therefore, this inventions three objectives are, (1) not to restrict the outflow of sewer and grease trap vent pipes. It is a natural process for the sewer and grease trap to breath out as well as in. restricting the outflow at one point of exit will only force the pressurized gas to seek another route. It is well known that the pressurized gas will forced its way through the plumbing systems protective water traps and into the breathing space. Therefore not to restrict, but to treat the exhaust that contains pungent hydra carbon, sulfides, bacteria and viruses, that can cause illness is the proper solution.

[0030] (2) This product has been developed, tested and proven its ability to kill contaminates such as, bacteria and viruses in the exhaust of sewer and grease trap vents.

[0031] The Environmental Protection Agency requires a certain amount of outside air to be brought into a buildings interior. The amount of fresh air is based on the number of occupants and the type activity in the building. This air is usually filtered to catch the larger contaminants but most filters cannot stop gas, bacteria, viruses or even mold spores and pollens. This invention will reduce the amount of problem causing contaminants. (3) It is an effective method for eliminating the odors being exhausted from sewer and grease trap vent pipes and not allowing them to enter the building.

EIGHT FIGURES EXPLAINED

[0032] In the drawings, related figs. have the same numbers.

[0033]FIG. 1 shows various aspects of a frontal view of the total assembly apparatus for eliminating odors and killing bacteria associated with the emissions from sewer and grease trap vents.

[0034]FIG. 2 shows frontal view of the lamp holding section with ballast power pack and the ultraviolet lamp.

[0035]FIG. 3 shows a view of the apparatus from the bottom to the top including the electrical enclosure. Also showing a view of the adjustable outside air intake.

[0036]FIG. 4 shows a right side profile with view of the electrical enclosure and fan housing section.

[0037]FIG. 5 shows left side profile.

[0038]FIG. 6 Parts breakdown drawing of the vent pipe section. This fig explained in the “detailed description of the invention” section.

[0039]FIG. 7A Parts breakdown drawing of the electrical and fan section facing the front opening of part 21. This fig explained in the “detailed description of the invention” section.

[0040]FIG. 7B Parts breakdown drawing of the electrical and fan section facing the right side of part 21 This fig explained in the “detailed description of the invention” section.

[0041]FIG. 8 Parts breakdown drawing of the lamp bulb holder section. This fig explained in the “detailed description of the invention” section.

REFERENCE NUMBERS IN PARTS DRAWINGS EXPLAINED FOR DEVICE FOR ELIMINATION OF ODORS AND KILLING BACTERIA ASSOCIATED WITH SEWER AND GREASE TRAP VENT EMISSIONS

[0042] Unit to be made to fit 2, 3, 4, 6 inch and larger sizes of vent pipes.

[0043] This parts list depicts the 3-inch model

[0044] Parts list 1 of 3,

[0045] The Ultraviolet Bulb Housing/Vent Section.

[0046]12. 12, 13, 14 Are all part of the same unit. It is one half of a 1½ inch Slip Joint Union. (rubber gromment sleeve coupling) This union consists of three parts; 1. Receiver for 1½ inch rubber bushing. 2. 1½ inch rubber bushing, 3. 1½ inch pressure nut. The rubber sleeve connector comes with matching ends to repair broken pipes. The connector is cut in half and makes two 12, 13, 14 part assemblies.

[0047]13. Same as no. 12

[0048]14. Same as no. 12

[0049]15. 3 inch—3 inch×2 inch Clean out Y no. C4861-CH (For the 3 inch model)

[0050]16. 3 inch PVC Snap in drain cover (For the 3 inch model) by Oatey 38753-43565

[0051]17. 14 inch Section of 3 inch PVC pipe

[0052]18. ¾ inch 33 degree slant cut PVC pipe. Same for all models

[0053]19. Stainless Steel liner. For 3 inch pipe 12×11 inches 25 gauge no. 8 reflective finished

[0054]20. Rubber Flexible Drain Coupling (3X3 P1056-33). For 3 inch pipe

[0055] Parts list 2 of 3 The Electrical/Fan Sections

[0056] Same for all models

[0057]21. 2 inch L.B. (left hand turn, opens on the back) NO. 3448106546, E9876J Carion Electric, PVC Gray

[0058]22. Safety cut off switch, 3 amp, hinge lever. part # D2F-F1 Mouser electronics 653-D2F-F1

[0059]23. ¾ inch lock nut

[0060]24. ¾ inch Elbow glue to threaded 32807

[0061]25. Hose strainer washer 140814

[0062]26. Photo Control 2001 ½ inch 180 degree Swivel 120V conduit mounting. (optional)

[0063]27. ½ inch base ⅜ inch Cord Grip. Appleton Electric CG1850 catalog number. Cable range. 187-312

[0064]28. A/C To D/C adapter 12V DC/200ma 412-112024 Mouser electronics (optional)

[0065]29. 5A Fuse holder 5×20 mm 2701238

[0066]30. 3¼ inch×5 inch plate of pvc.

[0067]31. ¾ inch hole

[0068]32. 3 inch long section of 2 inch PVC pipe

[0069]33. 3 inch×2 inch Rubber Flexible Drain Coupling 3X2 no. P1056-32.

[0070]34. Tube Axial Fan with wire leads. Mouser 1.57×1.57×0.47 120V Ball Bearing

[0071]35. Bushing. 3 inch pipe 1 inch long

[0072]36. 3 inch adjustable screen built from two three inch pipe caps. 3 in test cap 38753 39102

[0073]37. Stainless bolt No. 10-24×¾ no. 33041

[0074]38. Lock washers No. 10 no. 20391

[0075]39. Washer No. 10 Zink

[0076]40. Wing nut No. 10-24

[0077]41. Reducer plug 2 inch×¾ inch PVC No. 30217

[0078]42. Street elbow ¾ inch 90 degree NO. 039923142344

[0079]43. ¾ inch Glue to ½ inch Thread adapter NO. 34275

[0080]44. Cord Grip ½ inch base ⅜ Grip. Appleton Electric catalog number CG1850. Cable range. 187-312

[0081]45. 16 Gauge Extension Cord With Ground NO. 045131440349

[0082]46. 2 inch offset PVC adapter

[0083]47. Cover it comes with 21. 2 inch L.B. NO. 3448106546, E9876J Carion Electric, PVC Gray

[0084]48. Cover Screw 8×32 comes with 21. 2 inch L.B. NO. 3448106546, E9876J Carion Electric, PVC Gray

[0085] Parts list 3 of 3, The U. V. Bulb Holder Section.

[0086] The same for all models

[0087]49. Ultraviolet Ballast 14 Watt 400MA.

[0088]50. 18 Gauge 4 conductor electrical cord 2 feet long it comes with the Ballast.

[0089]51. 1½ inch Rubber Cap No. PQC-101

[0090]52. ⅜ inch Stress relief in gray HJ1013GPK25

[0091]53. 1½ inch pipe 8 inches long.

[0092]54. Retaining Ring made from 1¼ inch pvc pipe. It is 2 inch long with a ¼ inch section removed.

[0093]55. 55, 57, 58 Are all part of the same unit. It is one half of a ½ inch Slip Joint Union. (rubber grommet sleeve couplings This union consist of three parts 1. Receiver for ½ rubber bushing. 2. ½ inch rubber bushing, 3. ½ inch pressure nut. The rubber sleeve connector comes with matching ends to repair broken pipes. The connector is cut in half and makes two 55, 57, 58 part assemblies.

[0094]56. Ultraviolet Bulb electrical receiver. It comes with the (no.1) 14 Watt UV Ballast, Wire and Bulb Assembly.

[0095]57. Same as no. 55

[0096]58. Same as no. 55

[0097]59. Ultraviolet Lamp bulb 8 to 12 inches long and ½ inch in diameter

DETAILED DESCRIPTION OF THE INVENTION

[0098] The process and the apparatus description of similar parts has been indicated in the specification and drawings with the same reference numerals where appropriate. The drawings are not to scale and some sections have been enlarged for clarification purposes. All of the various controlling electrical lines have been left out for clarity.

[0099] This apparatus and process being described has the capability of treating exhaust vapors from sewer and grease trap vent stacks. FIG. 1, a drawing describing the major components of the overall vent stack extension and ultraviolet bulb housing assembly. Specific details are shown in subsequent figures. FIG. 2, a drawing describing the ultraviolet bulb holding section made of pvc pipe 55, 56 and 57. Also shown is an ultraviolet lamp bulb 59 and the ballast 51 a power supply for the bulb. Other specific details are shown in subsequent figures. FIG. 3, shows a view of the apparatus from the bottom to the top including 21, the electrical enclosure and also shows a view of 36, the adjustable outside air intake.

[0100] A rubber end coupling 20 connects the device directly to the sewer or grease trap vent pipe. The bulb housing section 17 is the main vent extension pipe. Other aspects of this unit will be discussed in subsequent figures. FIG. 4 shows a right side profile with view of 21 the electrical enclosure. The fan housing unit 33 is a 2 inch×3 inch rubber reducer. The top of the vent pipe assembly 15 is a 3 in×2 in×3 in PVC clean out that is used to hold the lamp section and provides an exhaust port for the gases. The 3 inch exhaust port is covered by 16, a snap in drain cover that is used as a pest screen. The top section 51, 53,12,54 and 50 are all part of FIG. 2, the lamp bulb holding section and will be described in detail in the parts page breakdown section.

[0101]FIG. 5, A 3 inch rubber coupling 20 connects 17 the bulb housing and vent extension tube to the top of the vent stack pipe (not shown). The top of 17 is connected to the PVC Y 15 that serves as the vent stack exhaust. The top section of FIG. 2 is the lamp holding section. Details will be described in FIG. 6, FIG. 7, and FIG. 8. FIG. 6 Parts breakdown drawing of the vent pipe section containing parts 12, a 1½ inch pressure nut, 13, a 1½ inch rubber bushing and 14, a 1½ inch bushing receiver. 12, 13, and 14, make a receiving and locking unit for FIG. 8 lamp holder section. The Receiving unit 12, 13 and 14 tightens onto 53 a 8 inch length of 1 ½ inch pipe. The Receiving unit 12, 13 and 14, combination unit is glued into the two-inch side of 15.

[0102] Used as a bird or bug screen, 16 is a 3 in snap in drain cover. 16 glues into 15 on the 3 inch side that is open to the outside air. Screen 16 protects the ultraviolet bulb. The lower remaining 3 inch opening of 15 is connected to the vent pipe section 17. Out the side and 4 inches up from the bottom end of 17 is 18B, a ¾ inch hole for receiving 18A a ¾ inch×1 inch 33 degree slant cut pipe. Outside air is forced through 18A into the U.V. light housing chamber 17. (The same for all models). The two purposes of 18A are, 1. A mounting ledge for 21 and 2. A air conduit for fan 34 to deliver outside air to the Ultraviolet housing chamber. A stainless steel sleeve 19 fits inside of 17 and provides a reflective, chemical resistant, cleanable surface. The vent pipe exhaust cleanup is enhanced by 19 in two ways; 1. Giving a hard cleanable surface that increases the durability of the device and 2. By reflecting the ultraviolet rays its killing capacity is intensified.

[0103] At base of 17 is a flexible rubber drain coupling 20. It is used to connect 17 the vent pipe extension unit to the existing 3-inch roof vent pipe stubs out (roof vent pipe stub-out not shown in diagrams).

[0104]FIG. 7A and FIG. 7B both are different perspective views of the electrical and fan section 21 and will be discussed together starting with 21 a 2 inch L.B. (left hand turn, opens on the back) electrical wiring pull box NO. 3448106546, E9876J from Carion Electric, PVC Gray. Serving as the housing for the electrical components, 21 has several key devices on its outside as well as inside. Located inside is 22, a safety cut off switch, 3 amp, hinge lever positioned so that when the cover plate 47 is removed the power is

DETAILED DESCRIPTION OF THE INVENTION

[0105] automatically turned off to the unit, thus protecting the service technician. The power leaves the closed safety cut off and goes through 29, a 5 amp fuse and holder 5×20MM 2701238. 27 is a ½ inch based ⅜ inch cord grip for holding and making a water-tight connection on 50, which is an 18 Gauge, 4 conductor electrical cord 2 feet long (it comes with the Ballast 49). An optional part is 28 an ac to dc converter for use of a 12-volt fan instead of 120 volt. Another optional part, 26, is a photo control 2001 with a ½ inch base, for when night time use is not desired.

[0106] Providing the u.v. light chamber with outside air is a tube axial fan with wire leads no.34. It is a NMB 1.57 in×1.57 in×0.47 120 v (volt) ball bearing fan. It provides an airflow of 6-8 CFM (cubic feet per minute) (different fans are used for different cfm needs). The air is forced through 18A and into air chamber 17. The electrical housing box 21 has a 4 part cooling system; 1. A deliberate air leak around the air chamber block no.30 past the electrical components and out the side close to the top. A combination unit of 2. A ¾ lock nut 23 and 3. A ¾ inch 90 degree street elbow 24, 4. A hose strainer washer 140814, no. 25 used to keep out pest. Without this coolant system some of the electrical components would overheat and fail. Failures cause unnecessary down time, undue expense and dissatisfied customers.

[0107] The outside air provided by the fan 34 is moved through the air chamber in 21 and is directed toward the air duct 31 (a ¾ in hole) by the air block 30 a curved section of pvc (poly vinyl chloride) pipe. The outside air is pushed through 31, 18A and 18B into the ultraviolet light and vent exhaust chamber. In this chamber the ultraviolet lamp is bathed with the oxygen it needs to generate the odor killing ozone. 32 is a 3 inch long section of 2 inch pvc pipe that connects 21 to 46, a 2 inch off set PVC adapter. The offset in 46 connects and provides the necessary room for 33 the fan housing to stand out and away from 17 the lamp and vent housing.

[0108] The fan 35 is held in place by 34, a retainer ring 3 inch diameter×1 inch long cut from pvc pipe. The fan 35 is protected from pest by a dual purpose adjustable screen 36. This adjustable screen keeps out pest bees, birds etc. and, allows the amount of outside air being drawn in to be adjusted. The adjustable screen 36 is constructed of two of 3 inch pvc test caps connected by a bolt 37, lock washer 38, fender washer 39 and wing nut 40 in combination. This screen unit has 20, % inch holes to allow the outside air to pass through, yet screening out pest.

[0109] The electrical cord 45, a 16-gauge extension cord with ground one foot in length, is held in place by 44, a ⅜ inch cord grip with a ¾ inch to ½ inch thread adapter bushing. 43 is connected to 42, a ¾ inch 90 degree pvc street elbow. Component no. 41, a 2 inch×¾ inch pvc reducer, connects 42 to 21, the LB electrical enclosure. The last of these components is 47, the L.B. enclosure lid held in place by two 8×32 cover screws 48.

[0110]FIG. 8 the lamp bulb holding section. This breakdown depicts 49, ultraviolet ballast the power supply for the ultraviolet light bulb. The 18 Gauge 4 conductor electrical cord 50, is 2 feet long and comes with the Ballast. This cord is passed through 52, a ⅜ inch stress relief in gray by Olflex, and ends at 56, a four pin ultraviolet bulb electrical receiver. 59 is a 14 watt ultraviolet lamp bulb, 12 inches long and ½ inch in diameter that plugs into 56. At the top of the unit is 51, a 1½ inch Rubber Cap. No. PQC-101. This cap closes off pipe 53 to protect the bulb's electrical connection from moisture.

[0111] Next is a reducing/retaining ring no. 54, structured from 1¼ inch pvc pipe 2 inch long with a ¼ inch section removed. The receiver 55 of the 55,57,58 bulb-holding combo, is recessed and glued 1 inch inside reducing ring 54, then glued 1½ inch recessed into 53.

[0112] The 55,57,58 bulb holding combo is actually, one half of a ½ inch Slip Joint Union. (rubber grommet sleeve coupling). This union consist of three parts; 1. A receiver for the ½ inch rubber bushing, 2. A ½ inch rubber bushing, 3. A ½ inch pressure nut. The rubber sleeve connector is cut in half and makes two 55, 57, 58 part assemblies.

[0113] That completes the parts assembly section. 

THE THREE OBJECTS AND ADVANTAGES
 1. In the past an accepted method of stopping the outflow of offensive odors from sewer and grease trap vent pipes has been to block the outflow by the use of a one-way vent cap. This type cap allowed the sewer system to draw in the air needed for the system to drain properly. This type of one-way vent cap blocks the outflow when the system needs to exhaust. Therefore, this inventions three objectives are, (1) not to restrict the outflow of sewer and grease trap vent pipes. It is a natural process for the sewer and grease trap to breath out as well as in. restricting the outflow at one point of exit will only force the pressurized gas to seek another route. It is well known that the pressurized gas will forced its way through the plumbing systems protective water traps and into the breathing space. Therefore not to restrict, but to treat the exhaust that contains pungent hydra carbon, sulfides, bacteria and viruses, that can cause illness is the proper solution. (2) This product has been developed, tested and proven its ability to kill contaminates such as, bacteria and viruses in the exhaust of sewer and grease trap vents.
 2. The Environmental Protection Agency requires a certain amount of outside air to be brought into a buildings interior. The amount of fresh air is based on the number of occupants and the type activity in the building. This air is usually filtered to catch the larger contaminants but most filters cannot stop gas, bacteria, viruses or even mold spores and pollens. This invention will reduce the amount of problem causing contaminants. (3) It is an effective method for eliminating the odors being exhausted from sewer and grease trap vent pipes and not allowing them to enter the building. 